In addition to reducing lines of code, this also ensures that the full allocation is always zeroed avoiding possible bugs with incorrect lengths passed to explicit_bzero(). Suggested by: cem Reviewed by: cem, delphij Approved by: csprng (cem) Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D25435
1008 lines
22 KiB
C
1008 lines
22 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1998 Michael Smith
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* The unified bootloader passes us a pointer to a preserved copy of
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* bootstrap/kernel environment variables. We convert them to a
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* dynamic array of strings later when the VM subsystem is up.
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*
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* We make these available through the kenv(2) syscall for userland
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* and through kern_getenv()/freeenv() kern_setenv() kern_unsetenv() testenv() for
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* the kernel.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/priv.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/sysent.h>
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#include <sys/sysproto.h>
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#include <sys/libkern.h>
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#include <sys/kenv.h>
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#include <sys/limits.h>
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#include <security/mac/mac_framework.h>
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static char *_getenv_dynamic_locked(const char *name, int *idx);
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static char *_getenv_dynamic(const char *name, int *idx);
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static MALLOC_DEFINE(M_KENV, "kenv", "kernel environment");
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#define KENV_SIZE 512 /* Maximum number of environment strings */
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static uma_zone_t kenv_zone;
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static int kenv_mvallen = KENV_MVALLEN;
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/* pointer to the config-generated static environment */
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char *kern_envp;
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/* pointer to the md-static environment */
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char *md_envp;
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static int md_env_len;
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static int md_env_pos;
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static char *kernenv_next(char *);
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/* dynamic environment variables */
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char **kenvp;
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struct mtx kenv_lock;
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/*
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* No need to protect this with a mutex since SYSINITS are single threaded.
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*/
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bool dynamic_kenv;
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#define KENV_CHECK if (!dynamic_kenv) \
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panic("%s: called before SI_SUB_KMEM", __func__)
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static char *getenv_string_buffer(const char *);
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int
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sys_kenv(td, uap)
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struct thread *td;
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struct kenv_args /* {
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int what;
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const char *name;
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char *value;
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int len;
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} */ *uap;
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{
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char *name, *value, *buffer = NULL;
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size_t len, done, needed, buflen;
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int error, i;
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KASSERT(dynamic_kenv, ("kenv: dynamic_kenv = false"));
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error = 0;
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if (uap->what == KENV_DUMP) {
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#ifdef MAC
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error = mac_kenv_check_dump(td->td_ucred);
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if (error)
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return (error);
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#endif
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done = needed = 0;
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buflen = uap->len;
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if (buflen > KENV_SIZE * (KENV_MNAMELEN + kenv_mvallen + 2))
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buflen = KENV_SIZE * (KENV_MNAMELEN +
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kenv_mvallen + 2);
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if (uap->len > 0 && uap->value != NULL)
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buffer = malloc(buflen, M_TEMP, M_WAITOK|M_ZERO);
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mtx_lock(&kenv_lock);
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for (i = 0; kenvp[i] != NULL; i++) {
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len = strlen(kenvp[i]) + 1;
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needed += len;
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len = min(len, buflen - done);
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/*
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* If called with a NULL or insufficiently large
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* buffer, just keep computing the required size.
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*/
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if (uap->value != NULL && buffer != NULL && len > 0) {
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bcopy(kenvp[i], buffer + done, len);
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done += len;
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}
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}
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mtx_unlock(&kenv_lock);
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if (buffer != NULL) {
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error = copyout(buffer, uap->value, done);
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free(buffer, M_TEMP);
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}
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td->td_retval[0] = ((done == needed) ? 0 : needed);
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return (error);
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}
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switch (uap->what) {
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case KENV_SET:
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error = priv_check(td, PRIV_KENV_SET);
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if (error)
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return (error);
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break;
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case KENV_UNSET:
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error = priv_check(td, PRIV_KENV_UNSET);
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if (error)
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return (error);
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break;
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}
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name = malloc(KENV_MNAMELEN + 1, M_TEMP, M_WAITOK);
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error = copyinstr(uap->name, name, KENV_MNAMELEN + 1, NULL);
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if (error)
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goto done;
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switch (uap->what) {
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case KENV_GET:
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#ifdef MAC
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error = mac_kenv_check_get(td->td_ucred, name);
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if (error)
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goto done;
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#endif
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value = kern_getenv(name);
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if (value == NULL) {
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error = ENOENT;
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goto done;
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}
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len = strlen(value) + 1;
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if (len > uap->len)
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len = uap->len;
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error = copyout(value, uap->value, len);
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freeenv(value);
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if (error)
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goto done;
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td->td_retval[0] = len;
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break;
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case KENV_SET:
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len = uap->len;
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if (len < 1) {
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error = EINVAL;
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goto done;
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}
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if (len > kenv_mvallen + 1)
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len = kenv_mvallen + 1;
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value = malloc(len, M_TEMP, M_WAITOK);
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error = copyinstr(uap->value, value, len, NULL);
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if (error) {
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free(value, M_TEMP);
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goto done;
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}
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#ifdef MAC
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error = mac_kenv_check_set(td->td_ucred, name, value);
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if (error == 0)
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#endif
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kern_setenv(name, value);
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free(value, M_TEMP);
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break;
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case KENV_UNSET:
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#ifdef MAC
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error = mac_kenv_check_unset(td->td_ucred, name);
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if (error)
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goto done;
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#endif
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error = kern_unsetenv(name);
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if (error)
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error = ENOENT;
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break;
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default:
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error = EINVAL;
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break;
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}
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done:
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free(name, M_TEMP);
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return (error);
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}
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/*
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* Populate the initial kernel environment.
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*
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* This is called very early in MD startup, either to provide a copy of the
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* environment obtained from a boot loader, or to provide an empty buffer into
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* which MD code can store an initial environment using kern_setenv() calls.
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*
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* kern_envp is set to the static_env generated by config(8). This implements
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* the env keyword described in config(5).
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*
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* If len is non-zero, the caller is providing an empty buffer. The caller will
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* subsequently use kern_setenv() to add up to len bytes of initial environment
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* before the dynamic environment is available.
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*
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* If len is zero, the caller is providing a pre-loaded buffer containing
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* environment strings. Additional strings cannot be added until the dynamic
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* environment is available. The memory pointed to must remain stable at least
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* until sysinit runs init_dynamic_kenv() and preferably until after SI_SUB_KMEM
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* is finished so that subr_hints routines may continue to use it until the
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* environments have been fully merged at the end of the pass. If no initial
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* environment is available from the boot loader, passing a NULL pointer allows
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* the static_env to be installed if it is configured. In this case, any call
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* to kern_setenv() prior to the setup of the dynamic environment will result in
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* a panic.
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*/
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void
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init_static_kenv(char *buf, size_t len)
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{
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char *eval;
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KASSERT(!dynamic_kenv, ("kenv: dynamic_kenv already initialized"));
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/*
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* Suitably sized means it must be able to hold at least one empty
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* variable, otherwise things go belly up if a kern_getenv call is
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* made without a prior call to kern_setenv as we have a malformed
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* environment.
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*/
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KASSERT(len == 0 || len >= 2,
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("kenv: static env must be initialized or suitably sized"));
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KASSERT(len == 0 || (*buf == '\0' && *(buf + 1) == '\0'),
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("kenv: sized buffer must be initially empty"));
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/*
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* We may be called twice, with the second call needed to relocate
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* md_envp after enabling paging. md_envp is then garbage if it is
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* not null and the relocation will move it. Discard it so as to
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* not crash using its old value in our first call to kern_getenv().
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*
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* The second call gives the same environment as the first except
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* in silly configurations where the static env disables itself.
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*
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* Other env calls don't handle possibly-garbage pointers, so must
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* not be made between enabling paging and calling here.
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*/
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md_envp = NULL;
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md_env_len = 0;
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md_env_pos = 0;
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/*
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* Give the static environment a chance to disable the loader(8)
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* environment first. This is done with loader_env.disabled=1.
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*
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* static_env and static_hints may both be disabled, but in slightly
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* different ways. For static_env, we just don't setup kern_envp and
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* it's as if a static env wasn't even provided. For static_hints,
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* we effectively zero out the buffer to stop the rest of the kernel
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* from being able to use it.
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*
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* We're intentionally setting this up so that static_hints.disabled may
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* be specified in either the MD env or the static env. This keeps us
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* consistent in our new world view.
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*
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* As a warning, the static environment may not be disabled in any way
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* if the static environment has disabled the loader environment.
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*/
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kern_envp = static_env;
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eval = kern_getenv("loader_env.disabled");
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if (eval == NULL || strcmp(eval, "1") != 0) {
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md_envp = buf;
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md_env_len = len;
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md_env_pos = 0;
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eval = kern_getenv("static_env.disabled");
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if (eval != NULL && strcmp(eval, "1") == 0) {
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kern_envp[0] = '\0';
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kern_envp[1] = '\0';
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}
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}
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eval = kern_getenv("static_hints.disabled");
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if (eval != NULL && strcmp(eval, "1") == 0) {
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static_hints[0] = '\0';
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static_hints[1] = '\0';
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}
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}
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static void
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init_dynamic_kenv_from(char *init_env, int *curpos)
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{
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char *cp, *cpnext, *eqpos, *found;
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size_t len;
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int i;
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if (init_env && *init_env != '\0') {
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found = NULL;
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i = *curpos;
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for (cp = init_env; cp != NULL; cp = cpnext) {
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cpnext = kernenv_next(cp);
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len = strlen(cp) + 1;
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if (len > KENV_MNAMELEN + 1 + kenv_mvallen + 1) {
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printf(
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"WARNING: too long kenv string, ignoring %s\n",
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cp);
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goto sanitize;
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}
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eqpos = strchr(cp, '=');
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if (eqpos == NULL) {
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printf(
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"WARNING: malformed static env value, ignoring %s\n",
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cp);
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goto sanitize;
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}
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*eqpos = 0;
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/*
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* De-dupe the environment as we go. We don't add the
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* duplicated assignments because config(8) will flip
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* the order of the static environment around to make
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* kernel processing match the order of specification
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* in the kernel config.
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*/
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found = _getenv_dynamic_locked(cp, NULL);
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*eqpos = '=';
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if (found != NULL)
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goto sanitize;
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if (i > KENV_SIZE) {
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printf(
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"WARNING: too many kenv strings, ignoring %s\n",
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cp);
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goto sanitize;
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}
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kenvp[i] = malloc(len, M_KENV, M_WAITOK);
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strcpy(kenvp[i++], cp);
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sanitize:
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explicit_bzero(cp, len - 1);
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}
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*curpos = i;
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}
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}
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/*
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* Setup the dynamic kernel environment.
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*/
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static void
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init_dynamic_kenv(void *data __unused)
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{
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int dynamic_envpos;
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int size;
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TUNABLE_INT_FETCH("kenv_mvallen", &kenv_mvallen);
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size = KENV_MNAMELEN + 1 + kenv_mvallen + 1;
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kenv_zone = uma_zcreate("kenv", size, NULL, NULL, NULL, NULL,
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UMA_ALIGN_PTR, 0);
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kenvp = malloc((KENV_SIZE + 1) * sizeof(char *), M_KENV,
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M_WAITOK | M_ZERO);
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dynamic_envpos = 0;
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init_dynamic_kenv_from(md_envp, &dynamic_envpos);
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init_dynamic_kenv_from(kern_envp, &dynamic_envpos);
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kenvp[dynamic_envpos] = NULL;
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mtx_init(&kenv_lock, "kernel environment", NULL, MTX_DEF);
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dynamic_kenv = true;
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}
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SYSINIT(kenv, SI_SUB_KMEM + 1, SI_ORDER_FIRST, init_dynamic_kenv, NULL);
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void
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freeenv(char *env)
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{
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if (dynamic_kenv && env != NULL) {
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explicit_bzero(env, strlen(env));
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uma_zfree(kenv_zone, env);
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}
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}
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/*
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* Internal functions for string lookup.
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*/
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static char *
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_getenv_dynamic_locked(const char *name, int *idx)
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{
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char *cp;
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int len, i;
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len = strlen(name);
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for (cp = kenvp[0], i = 0; cp != NULL; cp = kenvp[++i]) {
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if ((strncmp(cp, name, len) == 0) &&
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(cp[len] == '=')) {
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if (idx != NULL)
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*idx = i;
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return (cp + len + 1);
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}
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}
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return (NULL);
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}
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static char *
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_getenv_dynamic(const char *name, int *idx)
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{
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mtx_assert(&kenv_lock, MA_OWNED);
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return (_getenv_dynamic_locked(name, idx));
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}
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static char *
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_getenv_static_from(char *chkenv, const char *name)
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{
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char *cp, *ep;
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int len;
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for (cp = chkenv; cp != NULL; cp = kernenv_next(cp)) {
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for (ep = cp; (*ep != '=') && (*ep != 0); ep++)
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;
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if (*ep != '=')
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continue;
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len = ep - cp;
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ep++;
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if (!strncmp(name, cp, len) && name[len] == 0)
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return (ep);
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}
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return (NULL);
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}
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static char *
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_getenv_static(const char *name)
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{
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char *val;
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val = _getenv_static_from(md_envp, name);
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if (val != NULL)
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return (val);
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val = _getenv_static_from(kern_envp, name);
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if (val != NULL)
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return (val);
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return (NULL);
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}
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|
|
/*
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|
* Look up an environment variable by name.
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|
* Return a pointer to the string if found.
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|
* The pointer has to be freed with freeenv()
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|
* after use.
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*/
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char *
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kern_getenv(const char *name)
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{
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char *ret;
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if (dynamic_kenv) {
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ret = getenv_string_buffer(name);
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if (ret == NULL) {
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WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
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"getenv");
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}
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} else
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ret = _getenv_static(name);
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return (ret);
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}
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|
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/*
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* Test if an environment variable is defined.
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|
*/
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int
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testenv(const char *name)
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{
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char *cp;
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|
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if (dynamic_kenv) {
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mtx_lock(&kenv_lock);
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cp = _getenv_dynamic(name, NULL);
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mtx_unlock(&kenv_lock);
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} else
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cp = _getenv_static(name);
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if (cp != NULL)
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return (1);
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return (0);
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}
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|
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/*
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|
* Set an environment variable in the MD-static environment. This cannot
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|
* feasibly be done on config(8)-generated static environments as they don't
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|
* generally include space for extra variables.
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|
*/
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static int
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|
setenv_static(const char *name, const char *value)
|
|
{
|
|
int len;
|
|
|
|
if (md_env_pos >= md_env_len)
|
|
return (-1);
|
|
|
|
/* Check space for x=y and two nuls */
|
|
len = strlen(name) + strlen(value);
|
|
if (len + 3 < md_env_len - md_env_pos) {
|
|
len = sprintf(&md_envp[md_env_pos], "%s=%s", name, value);
|
|
md_env_pos += len+1;
|
|
md_envp[md_env_pos] = '\0';
|
|
return (0);
|
|
} else
|
|
return (-1);
|
|
|
|
}
|
|
|
|
/*
|
|
* Set an environment variable by name.
|
|
*/
|
|
int
|
|
kern_setenv(const char *name, const char *value)
|
|
{
|
|
char *buf, *cp, *oldenv;
|
|
int namelen, vallen, i;
|
|
|
|
if (!dynamic_kenv && md_env_len > 0)
|
|
return (setenv_static(name, value));
|
|
|
|
KENV_CHECK;
|
|
|
|
namelen = strlen(name) + 1;
|
|
if (namelen > KENV_MNAMELEN + 1)
|
|
return (-1);
|
|
vallen = strlen(value) + 1;
|
|
if (vallen > kenv_mvallen + 1)
|
|
return (-1);
|
|
buf = malloc(namelen + vallen, M_KENV, M_WAITOK);
|
|
sprintf(buf, "%s=%s", name, value);
|
|
|
|
mtx_lock(&kenv_lock);
|
|
cp = _getenv_dynamic(name, &i);
|
|
if (cp != NULL) {
|
|
oldenv = kenvp[i];
|
|
kenvp[i] = buf;
|
|
mtx_unlock(&kenv_lock);
|
|
free(oldenv, M_KENV);
|
|
} else {
|
|
/* We add the option if it wasn't found */
|
|
for (i = 0; (cp = kenvp[i]) != NULL; i++)
|
|
;
|
|
|
|
/* Bounds checking */
|
|
if (i < 0 || i >= KENV_SIZE) {
|
|
free(buf, M_KENV);
|
|
mtx_unlock(&kenv_lock);
|
|
return (-1);
|
|
}
|
|
|
|
kenvp[i] = buf;
|
|
kenvp[i + 1] = NULL;
|
|
mtx_unlock(&kenv_lock);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Unset an environment variable string.
|
|
*/
|
|
int
|
|
kern_unsetenv(const char *name)
|
|
{
|
|
char *cp, *oldenv;
|
|
int i, j;
|
|
|
|
KENV_CHECK;
|
|
|
|
mtx_lock(&kenv_lock);
|
|
cp = _getenv_dynamic(name, &i);
|
|
if (cp != NULL) {
|
|
oldenv = kenvp[i];
|
|
for (j = i + 1; kenvp[j] != NULL; j++)
|
|
kenvp[i++] = kenvp[j];
|
|
kenvp[i] = NULL;
|
|
mtx_unlock(&kenv_lock);
|
|
zfree(oldenv, M_KENV);
|
|
return (0);
|
|
}
|
|
mtx_unlock(&kenv_lock);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Return a buffer containing the string value from an environment variable
|
|
*/
|
|
static char *
|
|
getenv_string_buffer(const char *name)
|
|
{
|
|
char *cp, *ret;
|
|
int len;
|
|
|
|
if (dynamic_kenv) {
|
|
len = KENV_MNAMELEN + 1 + kenv_mvallen + 1;
|
|
ret = uma_zalloc(kenv_zone, M_WAITOK | M_ZERO);
|
|
mtx_lock(&kenv_lock);
|
|
cp = _getenv_dynamic(name, NULL);
|
|
if (cp != NULL)
|
|
strlcpy(ret, cp, len);
|
|
mtx_unlock(&kenv_lock);
|
|
if (cp == NULL) {
|
|
uma_zfree(kenv_zone, ret);
|
|
ret = NULL;
|
|
}
|
|
} else
|
|
ret = _getenv_static(name);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Return a string value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_string(const char *name, char *data, int size)
|
|
{
|
|
char *cp;
|
|
|
|
if (dynamic_kenv) {
|
|
mtx_lock(&kenv_lock);
|
|
cp = _getenv_dynamic(name, NULL);
|
|
if (cp != NULL)
|
|
strlcpy(data, cp, size);
|
|
mtx_unlock(&kenv_lock);
|
|
} else {
|
|
cp = _getenv_static(name);
|
|
if (cp != NULL)
|
|
strlcpy(data, cp, size);
|
|
}
|
|
return (cp != NULL);
|
|
}
|
|
|
|
/*
|
|
* Return an array of integers at the given type size and signedness.
|
|
*/
|
|
int
|
|
getenv_array(const char *name, void *pdata, int size, int *psize,
|
|
int type_size, bool allow_signed)
|
|
{
|
|
uint8_t shift;
|
|
int64_t value;
|
|
int64_t old;
|
|
char *buf;
|
|
char *end;
|
|
char *ptr;
|
|
int n;
|
|
int rc;
|
|
|
|
if ((buf = getenv_string_buffer(name)) == NULL)
|
|
return (0);
|
|
|
|
rc = 0; /* assume failure */
|
|
/* get maximum number of elements */
|
|
size /= type_size;
|
|
|
|
n = 0;
|
|
|
|
for (ptr = buf; *ptr != 0; ) {
|
|
|
|
value = strtoq(ptr, &end, 0);
|
|
|
|
/* check if signed numbers are allowed */
|
|
if (value < 0 && !allow_signed)
|
|
goto error;
|
|
|
|
/* check for invalid value */
|
|
if (ptr == end)
|
|
goto error;
|
|
|
|
/* check for valid suffix */
|
|
switch (*end) {
|
|
case 't':
|
|
case 'T':
|
|
shift = 40;
|
|
end++;
|
|
break;
|
|
case 'g':
|
|
case 'G':
|
|
shift = 30;
|
|
end++;
|
|
break;
|
|
case 'm':
|
|
case 'M':
|
|
shift = 20;
|
|
end++;
|
|
break;
|
|
case 'k':
|
|
case 'K':
|
|
shift = 10;
|
|
end++;
|
|
break;
|
|
case ' ':
|
|
case '\t':
|
|
case ',':
|
|
case 0:
|
|
shift = 0;
|
|
break;
|
|
default:
|
|
/* garbage after numeric value */
|
|
goto error;
|
|
}
|
|
|
|
/* skip till next value, if any */
|
|
while (*end == '\t' || *end == ',' || *end == ' ')
|
|
end++;
|
|
|
|
/* update pointer */
|
|
ptr = end;
|
|
|
|
/* apply shift */
|
|
old = value;
|
|
value <<= shift;
|
|
|
|
/* overflow check */
|
|
if ((value >> shift) != old)
|
|
goto error;
|
|
|
|
/* check for buffer overflow */
|
|
if (n >= size)
|
|
goto error;
|
|
|
|
/* store value according to type size */
|
|
switch (type_size) {
|
|
case 1:
|
|
if (allow_signed) {
|
|
if (value < SCHAR_MIN || value > SCHAR_MAX)
|
|
goto error;
|
|
} else {
|
|
if (value < 0 || value > UCHAR_MAX)
|
|
goto error;
|
|
}
|
|
((uint8_t *)pdata)[n] = (uint8_t)value;
|
|
break;
|
|
case 2:
|
|
if (allow_signed) {
|
|
if (value < SHRT_MIN || value > SHRT_MAX)
|
|
goto error;
|
|
} else {
|
|
if (value < 0 || value > USHRT_MAX)
|
|
goto error;
|
|
}
|
|
((uint16_t *)pdata)[n] = (uint16_t)value;
|
|
break;
|
|
case 4:
|
|
if (allow_signed) {
|
|
if (value < INT_MIN || value > INT_MAX)
|
|
goto error;
|
|
} else {
|
|
if (value > UINT_MAX)
|
|
goto error;
|
|
}
|
|
((uint32_t *)pdata)[n] = (uint32_t)value;
|
|
break;
|
|
case 8:
|
|
((uint64_t *)pdata)[n] = (uint64_t)value;
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
n++;
|
|
}
|
|
*psize = n * type_size;
|
|
|
|
if (n != 0)
|
|
rc = 1; /* success */
|
|
error:
|
|
if (dynamic_kenv)
|
|
uma_zfree(kenv_zone, buf);
|
|
return (rc);
|
|
}
|
|
|
|
/*
|
|
* Return an integer value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_int(const char *name, int *data)
|
|
{
|
|
quad_t tmp;
|
|
int rval;
|
|
|
|
rval = getenv_quad(name, &tmp);
|
|
if (rval)
|
|
*data = (int) tmp;
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Return an unsigned integer value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_uint(const char *name, unsigned int *data)
|
|
{
|
|
quad_t tmp;
|
|
int rval;
|
|
|
|
rval = getenv_quad(name, &tmp);
|
|
if (rval)
|
|
*data = (unsigned int) tmp;
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Return an int64_t value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_int64(const char *name, int64_t *data)
|
|
{
|
|
quad_t tmp;
|
|
int64_t rval;
|
|
|
|
rval = getenv_quad(name, &tmp);
|
|
if (rval)
|
|
*data = (int64_t) tmp;
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Return an uint64_t value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_uint64(const char *name, uint64_t *data)
|
|
{
|
|
quad_t tmp;
|
|
uint64_t rval;
|
|
|
|
rval = getenv_quad(name, &tmp);
|
|
if (rval)
|
|
*data = (uint64_t) tmp;
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Return a long value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_long(const char *name, long *data)
|
|
{
|
|
quad_t tmp;
|
|
int rval;
|
|
|
|
rval = getenv_quad(name, &tmp);
|
|
if (rval)
|
|
*data = (long) tmp;
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Return an unsigned long value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_ulong(const char *name, unsigned long *data)
|
|
{
|
|
quad_t tmp;
|
|
int rval;
|
|
|
|
rval = getenv_quad(name, &tmp);
|
|
if (rval)
|
|
*data = (unsigned long) tmp;
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Return a quad_t value from an environment variable.
|
|
*/
|
|
int
|
|
getenv_quad(const char *name, quad_t *data)
|
|
{
|
|
char *value, *vtp;
|
|
quad_t iv;
|
|
|
|
value = getenv_string_buffer(name);
|
|
if (value == NULL)
|
|
return (0);
|
|
iv = strtoq(value, &vtp, 0);
|
|
if (vtp == value || (vtp[0] != '\0' && vtp[1] != '\0')) {
|
|
freeenv(value);
|
|
return (0);
|
|
}
|
|
switch (vtp[0]) {
|
|
case 't': case 'T':
|
|
iv *= 1024;
|
|
/* FALLTHROUGH */
|
|
case 'g': case 'G':
|
|
iv *= 1024;
|
|
/* FALLTHROUGH */
|
|
case 'm': case 'M':
|
|
iv *= 1024;
|
|
/* FALLTHROUGH */
|
|
case 'k': case 'K':
|
|
iv *= 1024;
|
|
case '\0':
|
|
break;
|
|
default:
|
|
freeenv(value);
|
|
return (0);
|
|
}
|
|
freeenv(value);
|
|
*data = iv;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Find the next entry after the one which (cp) falls within, return a
|
|
* pointer to its start or NULL if there are no more.
|
|
*/
|
|
static char *
|
|
kernenv_next(char *cp)
|
|
{
|
|
|
|
if (cp != NULL) {
|
|
while (*cp != 0)
|
|
cp++;
|
|
cp++;
|
|
if (*cp == 0)
|
|
cp = NULL;
|
|
}
|
|
return (cp);
|
|
}
|
|
|
|
void
|
|
tunable_int_init(void *data)
|
|
{
|
|
struct tunable_int *d = (struct tunable_int *)data;
|
|
|
|
TUNABLE_INT_FETCH(d->path, d->var);
|
|
}
|
|
|
|
void
|
|
tunable_long_init(void *data)
|
|
{
|
|
struct tunable_long *d = (struct tunable_long *)data;
|
|
|
|
TUNABLE_LONG_FETCH(d->path, d->var);
|
|
}
|
|
|
|
void
|
|
tunable_ulong_init(void *data)
|
|
{
|
|
struct tunable_ulong *d = (struct tunable_ulong *)data;
|
|
|
|
TUNABLE_ULONG_FETCH(d->path, d->var);
|
|
}
|
|
|
|
void
|
|
tunable_int64_init(void *data)
|
|
{
|
|
struct tunable_int64 *d = (struct tunable_int64 *)data;
|
|
|
|
TUNABLE_INT64_FETCH(d->path, d->var);
|
|
}
|
|
|
|
void
|
|
tunable_uint64_init(void *data)
|
|
{
|
|
struct tunable_uint64 *d = (struct tunable_uint64 *)data;
|
|
|
|
TUNABLE_UINT64_FETCH(d->path, d->var);
|
|
}
|
|
|
|
void
|
|
tunable_quad_init(void *data)
|
|
{
|
|
struct tunable_quad *d = (struct tunable_quad *)data;
|
|
|
|
TUNABLE_QUAD_FETCH(d->path, d->var);
|
|
}
|
|
|
|
void
|
|
tunable_str_init(void *data)
|
|
{
|
|
struct tunable_str *d = (struct tunable_str *)data;
|
|
|
|
TUNABLE_STR_FETCH(d->path, d->var, d->size);
|
|
}
|